Determination of the heat transfer coefficient of a rotary film evaporator with a heating film-forming element

Authors

DOI:

https://doi.org/10.15587/1729-4061.2021.247283

Keywords:

heat transfer coefficient, rotary film evaporator, criterion equation, film-forming element, organic raw materials

Abstract

A model of a rotary film evaporator with a film-forming element with a reflective heated surface has been developed. This will allow stabilizing the hydraulic movement of the cut wave flow due to the reflective surface of the geometric shape for the forced direction of the cut raw material to the heating surface. Autonomous heating of the reflective surface additionally provides a temperature effect in the conditions of movement of particles of raw materials after cutting.

The analysis of the experimental and theoretical parameters of heat transfer made it possible to substantiate the criterion equation for determining the heat transfer coefficient of an evaporator with the proposed film-forming element and a reflective heated surface for calculating the coefficient from the working surface to the raw material. The resulting equation takes into account the influence of the vertical component of the motion of the raw material film, centrifugal movement during the rotation of the film-forming element, mixing of the boiling film of the raw material with steam bubbles, and the geometric characteristics of the film-forming blade on the hydrodynamic flow of the raw material. The calculation of the rotary-film evaporator was carried out using the criterion equation and the obtained useful heat exchange surface – 0.75 m2. The specific metal consumption in a rotary film evaporator with a film-forming element having a reflective surface is 57 kg/m2, compared to the vacuum evaporator traditionally used in canning industries (410 kg/m2), which is 7.1 times less. The duration of the temperature effect on the raw material is also reduced: a rotary film evaporator – 200 s and 3600 s in a traditional apparatus. The data obtained will be useful for the design of rotary-film devices of different geometric parameters using articulated blades with a reflective plate.

Author Biographies

Andrii Zahorulko, State Biotechnological University

PhD, Associate Professor

Department of Equipment and Engineering of Processing and Food Production

Aleksey Zagorulko, State Biotechnological University

PhD, Associate Professor

Department of Equipment and Engineering of Processing and Food Production

Oleksander Cherevko, Kharkiv State University of Food Technology and Trade

Doctor of Technical Sciences, Professor

Department of Processes and Equipment Food and Hospitality-Restaurant Industry named after M. Belaev

Olena Dromenko, State Biotechnological University

Associate Professor

Department of Meat Technology

Alla Solomon, Vinnytsia National Agrarian University

PhD, Associate Professor

Department of Food Technologies and Microbiology

Roman Yakobchuk, National University of Food Technologies

PhD, Associate Professor

Department of Technological Equipment and Computer Technology Design

Oksana Bondarenko, Dnipro State Agrarian and Economic University

PhD

Department of Plant Production

Nataliia Nozdrina, Dnipro State Agrarian and Economic University

PhD

Department of Plant Production

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Published

2021-12-24

How to Cite

Zahorulko, A., Zagorulko, A., Cherevko, O., Dromenko, O., Solomon, A., Yakobchuk, R., Bondarenko, O., & Nozdrina, N. (2021). Determination of the heat transfer coefficient of a rotary film evaporator with a heating film-forming element . Eastern-European Journal of Enterprise Technologies, 6(8 (114), 41–47. https://doi.org/10.15587/1729-4061.2021.247283

Issue

Vol. 6 No. 8 (114) (2021): Energy-saving technologies and equipment

Section

Energy-saving technologies and equipment

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Copyright (c) 2021 Andrii Zahorulko, Aleksey Zagorulko, Oleksander Cherevko, Olena Dromenko, Alla Solomon, Roman Yakobchuk, Oksana Bondarenko, Nataliia Nozdrina

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